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ICTD International Centre for Training and Development

Insulation Coordination for Power Systems

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This course provides delegates with a fundamental understanding of transient phenomena common to electric power systems. The material is especially suited for those who simulate transients with tools such as EMTP, those who analyze waveforms from transient recorders, those who conduct failure analysis, and those who design and specify transmission and distribution systems and equipment.

Course Objectives

The main objective of this course is to improve the participant’s understanding of power system transient and overvoltage events such as faults, switching and lightning surges. The participant will exit the course with greater ability to analyze waveforms from EMTP type simulations or from transient recorders. The participant will also have a stronger understanding of insulation coordination and surge arrester applications.

Course Outline

Day 1

  • Rated Voltage Stresses
  • Overvoltages from Faults and Ferranti rise
  • Backfeeding
  • First Order Transients
  • Second Order Transients

Day 2

  • Capacitor Switching
  • Circuit Breaker Transient Recovery Voltage
  • Fault Current Asymmetry
  • Transformer Inrush currents
  • Temporary Overvoltages
  • Ferroresonance
  • Blackstart

Day 3

  • Traveling Waves
  • Switching Surges from Line Energizing
  • Lightning Surges on Transmission Lines

Day 4

  • Surge Arrester Behavior
  • Surge Arrester Construction
  • Surge Arrester Applications

Day 5

  • Protective Margins and Insulation Coordination

Course Methodology

A variety of methodologies will be used during the course that includes:

  • (30%) Based on Case Studies
  • (30%) Techniques
  • (30%) Role Play
  • (10%) Concepts
  • Pre-test and Post-test
  • Variety of Learning Methods
  • Lectures
  • Case Studies and Self Questionaires
  • Group Work
  • Discussion
  • Presentation

Who should attend

The course is structured for electrical engineers that have some familiarity with electric power system analysis. Prior experience with transients is not necessary.


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